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J. E. JONES.

MOLDING MACHINE.

APPLICATION FILED JUNES, I920.

Patented Jan. 25, 1921.

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APPLICATION HLED jumzs. 1920.

Patented Jan. 25, 192 1.

2 SHEETS-SHEET 2.

V f 4 1* i II vamu UNITE STATES PAT E 1" over JAMES E. JONES, 0F RICHMOND, INDIANA.

IWOLDINGr-MACHINE.

7 Application filed June 5,

1 0 all whom zit may concern:

Be it known that 1, JAMES E. JONES, a citizen of the United States, residing in the city of Richmond, in the county of Wayne, State of Indiana, have invented a new and useful Molding-lVlachine, of which the fo1- lowing is a full, clear, and comprehensive specification and exposition, the same being such as will enable others to manufacture and use the same with exactitude.

The object of my present invention, broadly speaking, is to provide a .matrix forming machine which will be strong and durable in construction, simple in character, positive in action, easily operated and controlled, and which can be manufactured, sold, and operated at a comparatively low price.

In molding. metal it is customary toforin the mold or matrix of sand, taking the im pression in the sand from a pattern provided for thatpurpose. Withdrawing the matrix after it has been formed by the pattern is one of the most delicate operations to be per-. formed in the operation of machines of this character, as the newly formed sand-matrix, must be lifted from the pattern with abso. lute accuracy, otherwisethe matrix would be spoiled and the whole operation would have to be repeated. To accomplish these results and providemeans for applying the propel degree of pressure .to pack and bind the sand to form the matrixand give it the proper decree of cohesion, and to provide certainnewand novel details otconstruction whereby the work will'be'accomplished accurately and at a minimum of time and expense, is the paramount ohject oi this in vcntion.

Other objects and particular advantages of the invention will be brought outinthe following specification.

The preferred means for carryingoutthe principles of my invention in a practical and mechanical. manner is shown in the ac.- companying two-sheets of drawings, in which Fig'ure tie a letthandside elevation otthe complete machine. 2 is a'front elevation of the main portion of the machine, Fig. 3 is a vertical section of the main portion of the machine, as taken on the line 3-3 of Fig. 1, except that it is shown as in closed or compressed position. Fig. l is a, plan view of thepattern-plate, showing a pattern se- Specification of Letters Patent.

Patented Jan. 25, 1921.

1920. eel-an No. seaeso.

cured thereon. Fig. 5 is a detail front elevation or the stem of the head and its operative position with relation to the column and the swinging connection therewith, and especially showing the means for stopping the swinging movement of; the head in one direction. Fig. 6 is a vertical section of the upper portion of the column and the collar connected therewith. Fig. 7 is a detail view o'li-the means for retaining the lifting pins slidably. in positioirin the notch therefor. Fig. 8 is a detail vertical section, as taken on the line 8-8 of Fig. at. Fig. 9 is a detail section of the means for controlling the fingers, as taken on theline 9-9 of Fig. 2. Fig. 10 is a central sectiontaken through the three-way valve. And Fig. 11 is a reduced front elevation ofthe main portion of the machine.

Similar indices denote like parts through out the several views.

In order that the construction, the operation, and the advantages of my invention may heoetter understood and appreciated I will now take up a detailed description thereof, in which I will set forth the same as fully and as comprehensively as I may.

Referring now to the drawings in detail: T l-mineral 1 denotes the base. from which extends vertically the supporting column 2.

Rotatably mounted around the upper portion of the column is the collar 3, which rests on the flange 4, the latter being integral with the column or rigidly secured thereto. The collar 3 is removably retainedin position h); the cap 5 which-is cciiinected lay screws to the upper end of the column.

"Integral with and extending forward and downward from the collar 3 is the fiat arm 6, whose forward portion is integral with the head 7 and the stem 8. Said head is in the nature of a square plate horizontally. disposed, and the stem 8 extends up from the center thereof. Mounted toslide vertically throughthe center of the stem'8 and the head 7 is the hollow plunger 9, which projects above the top of the stem 8, and terminates in the lznoh'lO, also said plunger is adapted to be projected below the face of the head. Surrounding the plunger 9 and extending between the'knolo 10 and the top of the stem 8 is the helical spring 11 whose expansion normally forces the plunger upward. The chain 12 limits the upward movement of the plunger whereby the lower end of the plunger is normally retained substantially flush with the face of the head 7 Projecting out from the upper portion of the collar 3 is the lug 13, and projecting out and down from the cap 5 is the lug 14. The said lugs are adapted to contact with each other whereby the head 7 may swing only to the left, as in Fig. 11, and when swung back then the contacting of said lugs will cause the arm 6 to extend directly forward, as in Fig. 1.

Extending forward from the column 2 is the bracket 15, which carries the horizontal base 1.6. Extending up vertically from the base is the cylinder 17, the central portion of the base, with which it is integral, forming the bottom or head of said cylinder, the upper end of the cylinder being open.

Fitting in and slidable vertically in the cylinder is the piston 18, the wall and the lower head thereof being integral and without opening. Numeral 73 denotes the piston ring.

hxtending out from around the upper end'portion of the piston is a flange 19 which, when the piston is down rests onthe upper end of the cylinder and with the head of the piston in contact, or nearly so, with the surface of the base 16.

Covering the upper end of the piston, and

extending outward there beyond, is the square head '20, the same being secured to the flange 19 by means of the screws 21.

U 22, and corresponding in its diameters therewith, is the flask or frame 29. Each of the pins 23 is retained slidably in the position in which it is left in the notch 31 by a flat spring 30, and said springs are secured to the head 20, as in Fig. 7.

Extending upward from two opposite edges of the pattern-plate 22 are the guide pins 71 and 72, which fit snugly in apertures therefor in the flask 29, whereby the flask will be properly positioned with relation to the pattern-plate 22 and can only be removed therefrom by lifting it directly upward.

Formed through the center of the base 16 is an aperture in which is secured the nipple 24, and on the latter is secured the elbow 25, and extending out from said elbow is the pipe 26. On the outer end of the pipe 26 is attached the'elbow 27, and extending from the latter is the pipe 28 whose upper end is and 54 which are located on the end threaded into the socket 29 of the three-way valve shown in Fig. 10. Extending out from the socket 32 is the nipple 33 to which is connected the elbow 34, and extending down from the latter is the pipe 35. Connected to the lower end of the pipe 35 is the flexible hose or pipe 36 which is connected with the compressed-air supply, not shown.

Extending out from the socket 37 is the exhaust pipe 38. Numeral 39 denotes .the core of said valve, and on its outer end is connected the operating lever 40 by which the core may be rotated in order to permit compressed air to enter the valve through the socket 32 and then downward through the socket 29, from which latter the air is lead into the cylinder 17, and when core is turned in another direction the air will be cut oil, at the same time the air will be permitted to escape from the cylinder through the exhaust 38, in which latter position the core is shown in Fig. 10.

Secured on and extending upward from the corners of the base 16 are the hangers 41,42, 43 and 44. Carried by the hangers 41 and 42 is the shaft 45, likewise carried by the hangers 43 and 44 is the shaft 46.

Numeral 47 denotes a bar, which is located above and parallel with the shaft 45. the same having downwardly extending ears 48 and 49 which are located on the end portions of the shaft 45. Integral with the end portions of the bar 47 are the upwardly extending fingers 50 and 51 which extend to positions a short distance below the head 20.

Numeral 52 denotes a bar, which is located above and parallel with the shaft 46. and having downwardly extending ears 53 por tions of the shaft 46.

Integral with the end portions of the bar 52 are the upwardly extending fingers and 56 which extend to positions a short distance below the "head 20.

The fingers 50 and are pivotally connected to the connecting bar 57 whereby the four fingers, 50, 51 55 and 56 are adapted to swing together to the right and the left, with the upper ends of said fingers each adapted to come directly under one of the respective pins 23, whereby said pins may rest thereon under certain conditions as hereinafter explained.

Numeral 58 denotes a dog having a hu portion 59 pivoted on the shaft 46. Formed through the vertical web of the dog 58, at apoint to the right of the hub 59, is the verti cally extending slot 60. The ear 53'of the finger 55 projects to the right from the. shaft 46 parallel with the web of the dog 58 and near thereto, and a pintle 61, is secured on its extreme right-hand,- portion which pintle projects through the slot 60 and is movable vertically therein.

Numeral 62 denotes a stop which projects to the right from the wall of the cylinder 17, against which stop the finger may engage in order to limit the leftward movement of the finger 50, and therefore likewise limiting the movement of all of said fingers.

Numeral 63 denotes a fined stem which extends directly down from the flange 19, against the lower end of which the lefthand portion of the dog 58 may engage to limit its upward movement.

Numeral 64L denotes a relatively strong coil spring, one end of which is attached to the free end of the dog 58, and its other end is secured to the screw 65 carried by the wall of the cylinder 17. Said spring normally retains the dog upward to its limit against the stem 63. Also the relatively weak spring 66 is secured at one end to the screw 65, while its other end is attached to the upper portion of the finger 55.

Attention is called to the fact that the cars 48, 4:9 and 54 also extend to the right. and each carries a pintle 61, but they are not required in operation of the machine assembled but they are only for the purpose of making them interchangeable with that shown at the forward right-hand side as above described.

Numeral 67 denote patterns which arosecured on the surface or the plate 22, in this instance being patterns for piston rings, each being connected by the respective stems 68 with the central hub 69. Numeral 70 denotes molding sand in which the matrix is formed by the machine.

I desire that it be understood that the space between the fingers 50 and 51 and the bar 47 may be continuous metal, that is to say that the bar l7 may extend up even with the tops of the said fingers thereby forming said parts as a plate; or a second bar may connect the upper ends of the fingers, thereby forming said parts as a frame. And likewise the bar 52 and the fingers 55 and 56 may be similarly constructed if desired.

Operation: In practice the machine is first arranged as in Fig. 2, except that the head 7 should be swung to the left as in Fig. 11. In this instance the plate 22 is placed on the head 20. The first operation is to place the flask 29 in position on the plate 22, after which the flask is filled with sand 70, with the sand extending to a predetermined distance above the flask, which may he done by means of a fume (not shown) extending up from around the edges of the flask. After said frame has been removed then the head 7 is swung forward to the position in which it is shown in Fig. 2. Immediately after the above the lever 40 is turned to admit compressed air into the cylinder. which will force the piston 1S upward, bringing the sand into contact with the head 7 as in Fig. with the proper pressure to compress the sand inthe flask packing it around the pattern, thereby forming the matrix. hilanitestlyas the piston moves upward the stem (33 will be carried therewith, thereby releasing the d g 8 and permitting the spring (i l to move the dog upward to the position in which it shown in dotted lines in Fig. 2. 'lihe upward movement of the dog will cause the fingers 50, 51, 55 and 56 to move to. the left, by reason of the pintle 61 engaging the lower end of the slot 60, thereb bring g the said fingers to the positions in whi h they are indicated in dotted lines in Fig. 2, and in full lines in Fig. 3.

Now it the air be released from the cylinder the piston will move down gradually and the lower ends 0*! the pins 23 will impinge the upper ends of the respective fingers, thereby holding the flask and the R121. trix in suspension while the pattern-plate continues to move downward with the piston until the piston r aches its downward limit o'l movement, thereby withdrawin,;- th pattern from the matrix formed thereby, and thereby supporting the flask and the matrix. in the position in which they are shown in Fig. 1.

After the pins 23 have engaged the lingers the further downward movement of the piston will cause the stem 63 to press down the dog against the resiliency of the spring 6%, but as the weight of flask and the matrix is then resting on the fingers he comparatively weak spring 66 will not be able to move the fingers to the rightuntil said weight is removed. lint as soon as the flask and the matrix are lifted by the operator then the sprin 66 will immediately move them to the right whereby the pins 23 will he tree to be moved downward as a new flask is placed in position. It being understood that the length of the slot 60 is such as to ermit said relatively independent movements ot the fingers and the dog.

ll hilc the matrix is under compression the operator may press down on the knob 10, thereby causing the lower end of the plunger 9 to press through the' sand and engage the hub 69, thereby forming a pouring aperture to be formed in the center ot the matrix.

After the above described operations another llask is laid inposition and the oper ations are repeated as before.

It is to he understood that the means for 1 ing any of the advantages thereof which are new and useful. 7

l. molding machine having a cylinder, a piston slidable in the cylinder, a head covering the upper end of the piston and extending out therefrom beyond the cylinder, means for admitting compressed-air into the cylinder to force the piston upward, a plate carrying 'a pattern secured on the surface of said head, a flask resting on said plate and surrounding the pattern, means for removably retaining the flask in position but permitting it to move directly upward, vertically operative lifting-pins each slidably connected to the head, extending therebelow, and proiecting upward through said plate to engage the flask, means for retaining each of said pins in the position to which it may be moved, an upwardly extending finger located under each pin, means for positioning said fingers to be engaged by the pins, and means for moving said fingers out of line with the pins when the weight is removed from the pins.

2. In a machine of the character described, comprising a vertically movable head, a pattern carried by the head, a flask surrounding; the iattern, vertical pins slid ably mounted on t ehead, means whereby as the head and the pattern move downward the fiask will be retained in suspension supported by said pins, automatic means for engaging said pins to retain the flask in suspension above the head until it is removed. i'rom the machine, and means, for automatically releasing said pins to permit them to be moved downwardafter the flask is removed from the machine.

JAMES E. JONES.

Witnesses Ron'r. W. RANDLE, R. E. Barium.- 

